Coriolis influences on the interchange instability

Details Coriolis influences on the interchange instability Coriolis influences on the interchange instability

Dec 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997georl..24.2961p&link_type=abstract

Geophysical Research Letters, Volume 24, Issue 23, p. 2961-2964

Physics

4

Planetology: Fluid Planets: Orbital And Rotational Dynamics, Planetology: Fluid Planets: Ionospheres

Scientific paper

Previous treatments of rotationally driven interchange motion assume rigid corotation and incorporate centrifugal force into an effective gravity. When the ionospheric acceleration time is short, this approximation is acceptable, but in remote regions of the Jovian magnetosphere, the constraining influence of the ionosphere is increasingly ineffective. Conservation of angular momentum then governs local dynamics, and the Coriolis force is an essential part of the perturbation analysis. If the ionosphere is absent, the result agrees with earlier studies of magnetized Couette flow. If the ionosphere is merely very ineffective, the interchange criterion is not changed, but the instability growth rate is significantly reduced from earlier calculations.

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